Anyway, my conclusion would be that the 60D resolved more detail in this test case, but I am rather surprised how close the 2 are. To qianp2k's credit the 5D does much better than one would expect for the sensor resolution differences. Different tests with different lenses and different lighting situations might reveal different results too, of course. Even different RAW converters could make a difference, it's all a part of why it's so tough to compare different formats when the results are so close. I wonder too how the t4i or 7d would compare, it would be similar, but I suspect the AA filter differences could be enough to sway it one way or the other.

btw, I compared these files...

5d - 7282

60d - 7344

It is surprising, isn't it? You will be more surprised if you compare pictures taken outside with different lenses.

Anyways, I would love to know where in the scene Peter focused so that we can have a better understanding.